Improvement in g ig sav



UNITED STATns arniwr Garten.

FENN VILLCOX, OF NEWARK, NEW' JERSEY.

IMPROVEMENT lNGrlG SAW-HMG MACHINES.

Specification forming part of Letters Patent No. 35,?L5, dated June 24,18112.

To @ZZ whom] t may concern:

Beit known that I, FENN WILLoOX,.of Newark, in the county of Essex andState of New Jersey, have invented a new and Improved Muley or GigSawing Machine; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure l is a front view of my invention. Fig. 2 is a side sectionalview of the same, taken inthe line x sa, Fig. l; Fig. 3, a horizontalsection of a portion of the same, taken in the line y y, Fig. l.

Similar letters of reference indicatecorre sponding parts in the severalfigures.

The object of this invention is to `obtaiu a muley or gig sawing machinewhich will admit of saws of different lengths b eing secured in it withfacility, and also admit ot' more or less rake being given the saw, ascircumstances may require, and the tension of the saw-spring regulatedas desired, whereby the machine may be adapted for sawing stuff ofvarious thicknesses and rendered capable of a more general applicationthan those hitherto de-y vised.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a horizontal bed ,y which is sup-V ported at a properheight by any suitable framing, and Bis an upright framing which is overthe bed A, and has two vertical parallel guides, C C, connected to it,between which a reciprocating frame, D, is fitted and allowed to workfreely up and down. This frame D is composed of two bars, c c, connectedby parallel rods b, placed at an equal dist-ance apart, as shown clearlyin Fig. l.

To the lower end of the frame D a strap, E, is attached, which extendsupward at the back of the frame D and is connected to a pulley, F,placed loosely on a shaft, G, the bearings of which are in the framingB. The pulley F is connected to the shaftG by means of a clutch, H, onepart, c, of which is attached to pulley F and the other part, d,attached to a collar or sleeve, e, which has a screw-thread cut on itsexternal surface, on which a nut, f,is fitted.

I thrown in or out of gear with the part c, as may be desired. Thesleeve e is fitted on a square portion, g, of shaft G, and consequentlyturns with the latter, and when the pulley, F is connected to sleeve ethe former of course will be connected to shaft G.

On one end of the shaft G there is placed a handwheel, H', and on theopposite end a bevel-pinion, l, which gears into a horizontal wheel, J,on a vertical shaft, K, the bearings of which are in arms h nattached tothe framing b. On thcshaft K, above the wheel J, there is placed aspiral spring, L, the lower ed of which is connected with the wheel Jand the upper end with the upper arm h of the framing B.

M M are two supplemental guides for the frame D, and which are attachedto the framing B.

Nreprcsents the saw,ithe lower end of which is attached to a slide, O,actuated by a crankpulley, P, on the driving-shaft Q, as shown in Fig.2. The upper end of the saw is connected by a pin, t', with the lowerend of a plate, R, which is attached by a hinge or j oint, j, with aplate, S, which has hooks kprojecting from its back side to catch overthe rods b of the frame D and secure S to D, as shown clearly'in Fig. 2.The pin z of t-he saw N is fitted in a groove in the upper surface oflips l at the lower end of the plate R, also shown clearly in Fig. 2.The Lipper end of the plate S is provided with a horizontal projection,m, having a pendent lip, n, at its end, through the upper end of theplate B. By adjusting this set-screw it will be seen that more or lessrake may be given the saw, as may be desired--that is to say, the upperend ofthe saw may be thrown farther in or out from the frame D on avertical line. This will be fully understood by referring to Fig. 2.

T represents a Vertical bar, which is fitted in guides 0 0, attached tothe framing B, and has a vertical screw, U, secured to its upper end. Onthisv screw U there is iitted a nut, V,which is connected with abevel-wheel, X, into which a similar wheel, Y, on a horizontal shaft, Z,gears. The shaft Z has its bearings in the framing B, and is provided atits outer end with a hand-wheel, A.

Through the lower part of the bar T two which a set-screw, nx, passesand bears against screws, m m', pass horizontally. The upper l of theclutch H fromthe part c, and then raising screw m also passes throughvertical projection a n ou a sliding plate, B. in the frontend of whicha roller, C', is placed, and which, by turning the screw m', is made tobear against the back edge of the saw N. The sliding plate B is fittedbetween guidesl on a plate, D', which is provided with pendent lugs orears o d, through which the screw m passes. The Vertical bar T passesthrough oblong slots p' in the plates B D, and to the front end of theplate D, at its under side, there are pendants q, in which slides rareplaced, containing frietion-rollers s s. the slides r being adjusted byscrews r. The saw N works between these friction-rollers, and the lowersurfaces of the pendants q, serve as bearings or guides for the work orstuff to be sawed, preventing its upward movement under the upwardmovement of the saw. I f

By adjusting the plate S higher or lower ou the frame D, saws ot'different lengths may be used, and by disconnecting the pulley F fromthe shaft G the frame D may be more or less elevated, so that its lowerend cannot come in Contact with the plate D-a contingency which mightotherwise occur when thick stuit is sawed. This adjustment of the frameD, therefore, is an important feature of the invention, as it admits ol'very short as well as quite long saws being used-a result which cannotbe attained by the adjustment of the plate S alone. The spring L keepsthe saw N strained Ain proper position through the medium of the ygearing I J, pulley F, and strap E, and in order to adjust the frame Dhigher or lower the pulley F is disconnected from the shaft G by turningthe nut f so as to disconnect the part d or lowering the frame D to thedesired point. In order to prevent the relaxing ofthe spring L duringthis adjustment of frame D, the wheel H has a pawl, A, fitted in a notchin its periphery, as shown in Fig. l. The pendent bearings q q areadjusted higher or lower, to suit the thickness of the stuitl to besawed, by turning the nut VV and rwheel X through the medium ofthe wheelY on shaft Z. The rollers s s may be adj usted farther forward orbackward by turning the screw m.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The frame D, constructed as shown, in connection with the plate S,attached to said frame D by hooks lc, as and for the purpose set forth.

2. The adjustable plate R, connected by a hinge or joint, j, to theplate S and operated by a set-screw, nx, for the purpose of regulatingthe rake of the saw, as set forth.

8. Connecting the fratrie D to the shaft G by means of the strap E andpulley F, the latter being connected to its shaft G by the clutch H, toadmit ofthe adjustment of frame D, as descriloed.

4. 'The combination and arrangement ofthe gearing I J and spring L- forthe purpose of straining the saw N, as herein set forth.

5. The roller G, when placed in the adjust able plate B and attached tothe verticallyadjustable plate D', as and for the purpose set forth.

FENN VILLCOX.

Witnesses:

R. GAWLEY, JAMES LAIRD.

